CN111500895A - Metal part surface repairing material, metal part surface treatment process and application - Google Patents
Metal part surface repairing material, metal part surface treatment process and application Download PDFInfo
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- CN111500895A CN111500895A CN202010343451.0A CN202010343451A CN111500895A CN 111500895 A CN111500895 A CN 111500895A CN 202010343451 A CN202010343451 A CN 202010343451A CN 111500895 A CN111500895 A CN 111500895A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/067—Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
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- Coating By Spraying Or Casting (AREA)
Abstract
The invention relates to the technical field of surface repair of automobile parts, in particular to a metal part surface repair material, a metal part surface treatment process and application. The metal part surface repairing material comprises, by mass, 10-20% of Cr, 1-10% of Si, 1-10% of B, 1-10% of Cu, 1-10% of Mo, 0-5% of Fe, 0-3% of C, 1-20% of WC and the balance of Ni. The surface repair material for the metal parts has excellent self-fluxing property, and a coating prepared from the surface repair material has excellent high-temperature wear resistance and corrosion resistance. And when the thickness of the coating reaches the super-thick thickness of 1.5mm, the coating still has excellent anti-cracking performance, which cannot be achieved by the common nickel-chromium alloy powder.
Description
Technical Field
The invention relates to the technical field of surface repair of automobile parts, in particular to a metal part surface repair material, a metal part surface treatment process and application.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The failure due to wear in the engine accounts for a large proportion of the various failures. The four main forms of wear are promoted by poor lubrication, poor mating materials, poor manufacturing and assembly quality, deterioration of the conditions of use, the effects of dust and temperature, and the effect of alternating loads: abrasive wear, adhesive wear, corrosive wear and surface fatigue wear occur to varying degrees during operation of some of the major engine parts.
The form and characteristics of the damaged engine parts can be found as follows: the abrasion, the corrosion, the fatigue and the like are generated on the surface, or the surface is started first, so the improvement of the surface performance of the material plays an important role in prolonging the service life and playing the potential of the parts. The strengthening method for improving the surface wear resistance of the material is usually started from the aspects of improving the surface hardness and reducing the friction coefficient. The main conventional methods for improving the corrosion resistance of the surface of the material are. (1) Chrome plating because it is very stable in alkali, nitric acid, sulfides, carbonates and organic acids. (2) Nitriding is highly resistant to water, humid air, combustion products, and particularly nitric acid because it forms a highly stable phase layer on the surface of the component. (3) The alumetizing and siliconizing have good corrosion resistance to acid. (4) Steel parts, such as piston rings, are phosphated and blued, which prevent corrosion and reduce mechanical wear. At present, the conventional process mode is replaced by the spraying and remelting technology, on one hand, the spraying and remelting technology is used as one of additive manufacturing modes, the repair process of parts and parts with missing materials can be solved, and the repair process can not be finished by the processes of nitriding, aluminizing, siliconizing, phosphorizing, bluing and the like; on the other hand, the pollution generated in the technical process of spraying and remelting technology is simple to treat. The preparation process can generate noise and dust pollution, but as long as the production is carried out in a compliant facility, the noise can be effectively blocked, the dust can be filtered and collected, and the treatment is more economical and easy compared with the water pollution generated by electroplating processes such as chromium plating and the like.
The existing powder spraying technology comprises the steps of preparing a metal or ceramic coating on a base material by using methods such as flame, electric arc, plasma or explosion spraying and the like; the remelting techniques include laser, electron beam, TIG remelting, flame remelting, bulk heating, induction remelting, and the like. The remelting treatment melts fusible substances in the coating through a heat source, and the generated liquid phase is beneficial to strengthening and penetration in a diffusion process, so that the bonding strength between the coating and a substrate and the internal quality of the coating can be improved, and the wear resistance and the corrosion resistance of the coating are improved. The above techniques also present some problems: (1) the laser remelting has the main problems that materials such as ceramic coatings and the like are easy to generate cracks, fall off, holes and other defects under the conditions of extremely-fast heating and cooling; because the laser spot is small, for large-area remelting, the remelting needs to be completed by a lapping technical mode, and the coating performance is unstable in the aspects of hardness and the like. (2) The electron beam remelting and the laser remelting have many similarities, and the defect is mainly reflected in that the electron beam heating remelting must be in a vacuum environment, so that the remelting of large pieces and deep holes is greatly limited. (3) Compared with other remelting modes, the Tungsten Inert Gas (TIG) remelting has larger influence on deformation of the workpiece, and is not suitable for repairing the workpiece with high progress requirement. (4) The induction remelting is suitable for batch parts with simple shapes, and parts with complex shapes are difficult to apply. (5) The integral heating is suitable for mass production of workpieces without strict requirements on the change of matrix structure properties.
Disclosure of Invention
The invention provides a metal part surface repairing material, a metal part surface treatment process and application. The repair material of the invention has excellent self-fluxing property, and the prepared coating has excellent high-temperature wear resistance and corrosion resistance, so that: (1) the concept of green remanufacturing is introduced in the production of automobile parts so as to achieve the aim of saving manufacturing materials and energy consumption. (2) The service life and the maintenance cycle of the parts of the automobile power system are prolonged. (3) The failure rate of the automobile power system is reduced. For this purpose,
specifically, to achieve the above object, the technical solution of the present invention is as follows:
in a first aspect of the invention, the invention provides a metal part surface repairing material, which comprises the following raw materials in percentage by mass: 10-20% of Cr, 1-10% of Si, 1-10% of B, 1-10% of Cu, 1-10% of Mo, 0-5% of Fe, 0-3% of C, 1-20% of WC and the balance of Ni.
In the invention, preferably, the raw material composition of the metal part surface repair material comprises the following components: the alloy comprises, by mass, 16% of Cr, 4% of Si, 4% of B, 3% of Cu, 3% of Mo, 2.5% of Fe, 0.5% of C, 11% of WC and the balance of Ni. Cr can improve corrosion resistance, B and Si can enhance the self-fluxing property of the coating, Mo can improve the lubricity of the coating so as to improve the wear resistance, WC can improve the hardness of the coating so as to enhance the wear resistance, and Ni can ensure that the coating has functional stability under the high-temperature condition.
In some embodiments of the invention, the metallic part surface repair material is in powder form and has a particle size of 30-100 μm. The powdery raw material is convenient to prepare into a coating on the surface of the part by adopting a thermal spraying mode.
The surface repair material for the metal parts has excellent wear resistance, and the mechanism is as follows:
(1) dispersion strengthening and solid solution strengthening: on one hand, alloying elements in the powder are melted into the gamma solid solution to play a role in solid solution strengthening; on the other hand, (Cr, Fe) is formed during cooling7C3、Cr7C3And carbide of hard alloy, which are dispersed and distributed in the coating layer to play the role of dispersion strengthening.
(2) By adjusting the proportion of WC and Cr elements in the nickel-based powder, the solid solution strengthening and dispersion strengthening effects of the nickel-based powder are more obvious, the microhardness of the coating is further increased, and the performance index shows higher wear resistance.
(3) Influence of hard particles on wear resistance of the coating wear resistant particles: the alloy coating contains more unmelted carbide hard particles, which not only has good wear resistance, but also can play a role in stopping furrow expansion in the abrasive wear process, so that the grinding marks are always interrupted at the hard phase, and the wear process of the coating is slowed down.
In a second aspect of the present invention, a surface treatment process for a metal part is disclosed, comprising the following steps:
(1) pretreating the surface of the metal part to expose the metal matrix of the part for later use; the main purpose of pretreatment is to remove stains, grease, rust, oxide scales and the like on the surface of the part and ensure the quality of the coating.
(2) Heating the workpiece finally obtained in the step (1) to 80-120 ℃ of the surface of the workpiece; and then uniformly spraying metal alloy powder on the surface of the workpiece by using an oxygen propane high-speed flame spraying mode, after the thickness of the coating on the surface of the workpiece is qualified after flame spraying, heating the coating to 950-1150 ℃ by using propane gas, and fusing the coating with the surface of a workpiece substrate.
Further, in the step (1), firstly, removing pollutants such as oil stains on the surface of the workpiece by using an oil remover; then, sand blasting white corundum to polish the surface of the workpiece to reach the roughness of 75-125 um; then removing attachments such as oxide skin, rust and the like on the surface of the workpiece to achieve the surface cleanliness Sa3.0;
further, in the step (1), the spraying distance is controlled to be 150-200 mm, the ratio of oxygen to propane is 5:1, and the thickness of the coating reaches more than 1.5 mm.
The third aspect of the invention discloses application of the metal part surface repairing material in the fields of automobiles, aerospace and the like.
Compared with the prior art, the invention has the following beneficial effects:
(1) the surface repair material for the metal parts has excellent self-fluxing property, and a coating prepared from the surface repair material has excellent high-temperature wear resistance and corrosion resistance. And the coating of the invention still has excellent coating bonding strength when the thickness reaches the super-thick thickness of 1.5mm, which is not achieved by the common nickel-chromium alloy powder.
(2) The microhardness of the coating prepared by the invention can reach HV800-1000 which can not be reached by common nickel-chromium alloy powder.
(3) The coating prepared by high-speed flame spraying has high bonding strength with the matrix metal, and hard particles in the coating are tightly bonded with the matrix metal, so that the abrasion movement can be effectively blocked.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. Embodiments of the invention are described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 shows the surface topography after wear testing of a coating prepared according to a first embodiment of the present invention (left panel) and a metallic part substrate (right panel).
FIG. 2 is a scanning electron microscope microstructure of a cross section of a coating prepared according to a first embodiment of the present invention.
FIG. 3 is a scanning electron microscope microstructure of the surface of a coating prepared according to the first embodiment of the present invention.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The experimental procedures, in which specific conditions are not noted in the following examples, are generally carried out according to conventional conditions or according to conditions recommended by the manufacturers.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The reagents or starting materials used in the present invention can be purchased from conventional sources, and unless otherwise specified, the reagents or starting materials used in the present invention can be used in a conventional manner in the art or in accordance with the product specifications. In addition, any methods and materials similar or equivalent to those described herein can be used in the methods of the present invention. The preferred embodiments and materials described herein are intended to be exemplary only.
As mentioned above, during the use of metal parts, it is necessary to withstand high temperatures, impacts, friction and corrosion, and to have sufficient strength, rigidity, wear resistance and corrosion resistance. Therefore, the invention provides a metal part surface repairing material, a metal part surface treatment process and application. The invention will now be further described with reference to the drawings and detailed description of the specification.
First embodiment
A surface treatment process for metal parts comprises the following steps:
(1) pretreatment: firstly, removing pollutants such as oil stains on the surface of a workpiece by using an oil remover; then, the surface is polished by using 20-mesh white corundum in a sand blasting way to reach the roughness of 90 um; removing attachments such as oxide skin, rust and the like on the surface of the workpiece to achieve the surface cleanliness Sa3.0; after polishing, repairing the surface of the workpiece without visible attachments such as grease, dirt, oxide skin, rust and the like, and exposing the metal matrix of the part for later use;
(2) flame thermal spraying: the following powder alloys were used as repair materials for spraying (particle size 30-100 μm): the alloy comprises, by mass, 16% of Cr, 4% of Si, 4% of B, 3% of Cu, 3% of Mo, 2.5% of Fe, 0.5% of C, 11% of WC and the balance of Ni. The flame spraying comprises the following specific technical processes and parameters: firstly, heating a workpiece to enable the surface temperature of the workpiece to reach 120 ℃; then uniformly spraying metal alloy powder on the surface of the workpiece by using an oxygen propane high-speed flame spraying mode, wherein the spraying distance is controlled to be 200mm, and the ratio of oxygen to propane is 5:1, the thickness of the coating reaches more than 1.5 mm; and after the thickness of the coating on the surface of the workpiece is qualified after flame spraying, heating the coating to 1150 ℃ by using propane gas to fuse the coating with the surface of the workpiece matrix.
The wear resistance test of the coating prepared on the surface of the Q235 steel part and the Q235 steel part (substrate) of the embodiment is carried out, and the result is shown in FIG. 1, wherein the left graph is the surface appearance of the coating after the wear test, and the right graph is the surface appearance of the substrate after the wear test. It can be seen visually that the grinding scar of the substrate is deep and straight. And almost no grinding marks penetrating through the whole picture can be seen on the coating, most of the grinding marks are discontinuous and are disconnected from the coating, the width of the grinding marks is very narrow, the depth of the grinding marks is very shallow, and careful observation can find that some furrows are disconnected at some particles and continue to generate new grinding marks after being bypassed. This indicates that the wear resistance of the coating is significantly better than that of the substrate.
Further, the wear resistance effect was analyzed from the microstructure of the coating, and fig. 2 and 3 are the microstructure images of the cross section and the surface of the coating under an electron microscope, respectively. As can be seen from FIG. 2, the coating and the substrate are well combined, a heat affected zone of the substrate metal is arranged above the combined zone, an alloy coating zone is arranged below the combined zone, the coating zone has obvious dendritic crystal growth characteristics, the dendritic crystals are developed, and the dendritic crystals are finer. As can be seen from FIG. 3, the coating structure is crystallized in a hypoeutectic manner, primary gamma dendrites are precipitated when the coating is cooled after spraying, fine eutectic is formed among primary dendrites after continuous cooling to eutectic transformation, the eutectic is also composed of finer gamma dendrites and various compound phases, and supersaturated solid solutions and some eutectic compounds are formed in the coating.
Further, the mechanical properties, hardness, and the like of the coating layer prepared in this example were tested. The test results are shown in table 1.
TABLE 1
As can be seen from table 1: the bonding strength of the coating and the substrate prepared by the embodiment is more than 1000MPa, and the microhardness reaches 800-1000 HV. In addition, the coating has excellent crack resistance under the condition that the thickness of the coating is more than 1.5 mm.
Second embodiment
A surface treatment process for metal parts comprises the following steps:
(1) pretreatment: firstly, removing pollutants such as oil stains on the surface of a workpiece by using an oil remover; then, the surface is polished by using 20-mesh white corundum in a sand blasting way to reach the roughness of 125 um; removing attachments such as oxide skin, rust and the like on the surface of the workpiece to achieve the surface cleanliness Sa3.0; after polishing, repairing the surface of the workpiece without visible attachments such as grease, dirt, oxide skin, rust and the like, and exposing the metal matrix of the part for later use;
(2) flame thermal spraying: the following powder alloys were used as repair materials for spraying (particle size 30-100 μm): according to the mass percentage, 10 percent of Cr, 1 percent of Si, 10 percent of B, 10 percent of Cu, 1 percent of Mo, 5 percent of Fe, 3 percent of C, 20 percent of WC and the balance of Ni. The flame spraying comprises the following specific technical processes and parameters: firstly, heating a workpiece to enable the surface temperature of the workpiece to reach 100 ℃; then uniformly spraying metal alloy powder on the surface of the workpiece by using an oxygen propane high-speed flame spraying mode, wherein the spraying distance is controlled to be 180mm, the ratio of oxygen to propane is 5:1, and the thickness of the coating reaches more than 1.5 mm; and after the thickness of the coating on the surface of the workpiece is qualified after flame spraying, heating the coating to 950 ℃ by using propane gas to fuse the coating with the surface of the workpiece matrix.
Third embodiment
A surface treatment process for metal parts comprises the following steps:
(1) pretreatment: firstly, removing pollutants such as oil stains on the surface of a workpiece by using an oil remover; then, the surface is polished by using 20-mesh white corundum in a sand blasting way to reach the roughness of 75 um; removing attachments such as oxide skin, rust and the like on the surface of the workpiece to achieve the surface cleanliness Sa3.0; after polishing, repairing the surface of the workpiece without visible attachments such as grease, dirt, oxide skin, rust and the like, and exposing the metal matrix of the part for later use;
(2) flame thermal spraying: the following powder alloys were used as repair materials for spraying (particle size 30-100 μm): according to mass percent, 20 percent of Cr, 10 percent of Si, 1 percent of B, 1 percent of Cu, 10 percent of Mo, 1 percent of WC and the balance of Ni. The flame spraying comprises the following specific technical processes and parameters: firstly, heating a workpiece to enable the surface temperature of the workpiece to reach 80 ℃; then uniformly spraying metal alloy powder on the surface of the workpiece by using an oxygen propane high-speed flame spraying mode, wherein the spraying distance is controlled to be 150mm, the ratio of oxygen to propane is 5:1, and the thickness of the coating reaches more than 1.5 mm; and after the thickness of the coating on the surface of the workpiece is qualified after flame spraying, heating the coating to 1000 ℃ by using propane gas to fuse the coating with the surface of the workpiece matrix.
Fourth embodiment
A surface treatment process for metal parts comprises the following steps:
(1) pretreatment: the white corundum is subjected to sand blasting and polishing to remove stains, grease, rust and oxide skin on the surface of the Q235 steel part, and after polishing is finished, the surface of a repaired workpiece is free of visible attachments such as grease, dirt, oxide skin and rust, so that a metal matrix of the part is exposed for later use;
(2) flame thermal spraying: ni60 nickel-based powder alloy is used as a repair material for spraying: according to the mass percentage, the alloy comprises 0.9 percent of C, 3.2 percent of B, 16 percent of Cr, 2.0 percent of Fe, 4.0 percent of Si and the balance of Ni.
Further, the mechanical properties, hardness, and the like of the coating prepared in this example were tested by the same method as in the first example. The test results are shown in table 2.
TABLE 2
As can be seen from table 2: the hardness properties of the coating are lower than in the present invention. The properties of the alloy powder in terms of hardness are reduced.
Fifth embodiment
A surface treatment process for metal parts comprises the following steps:
(1) pretreatment: the white corundum is subjected to sand blasting and polishing to remove stains, grease, rust and oxide skin on the surface of the Q235 steel part, and after polishing is finished, the surface of a repaired workpiece is free of visible attachments such as grease, dirt, oxide skin and rust, so that a metal matrix of the part is exposed for later use;
(2) flame thermal spraying: using chromium carbide powder alloy as a repair material for spraying: by mass percent, C9.7 percent, Ni25 and the balance of Cr.
Further, the mechanical properties, hardness, and the like of the coating prepared in this example were tested by the same method as in the first example. The test results are shown in table 3.
TABLE 3
As can be seen from table 3: the hardness properties of the coating are superior to the present invention, but the bond strength is much lower than the present invention.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The surface repair material for the metal parts is characterized by comprising the following raw materials in percentage by mass: 10-20% of Cr, 1-10% of Si, 1-10% of B, 1-10% of Cu, 1-10% of Mo, 0-5% of Fe, 0-3% of C, 1-20% of WC and the balance of Ni.
2. The metal part surface repair material according to claim 1, wherein the raw material composition of the metal part surface repair material comprises the following components: the alloy comprises, by mass, 16% of Cr, 4% of Si, 4% of B, 3% of Cu, 3% of Mo, 2.5% of Fe, 0.5% of C, 11% of WC and the balance of Ni.
3. The metal part surface repair material according to claim 1 or 2, wherein the metal part surface repair material is in a powder form.
4. The metal part surface repair material according to claim 3, wherein the particle size of the metal part surface repair material is 30 to 100 μm.
5. A surface treatment process for metal parts is characterized by comprising the following steps:
(1) pretreating the surface of the metal part to expose the metal matrix of the part;
(2) heating the workpiece finally obtained in the step (1); and then uniformly spraying metal alloy powder on the surface of the workpiece by using an oxygen propane high-speed flame spraying mode, after the thickness of the coating on the surface of the workpiece is qualified after flame spraying, heating the coating by using propane gas to fuse the coating with the surface of a workpiece matrix.
6. The surface treatment process for metal parts according to claim 5, wherein in the step (2), the workpiece is heated to a temperature of 80 to 120 ℃.
7. The surface treatment process for metal parts according to claim 5, wherein in the step (2), the coating is heated to 950 to 1150 ℃.
8. The surface treatment process of metal parts according to any one of claims 5 to 7, wherein in the step (1), the surface of the workpiece is cleaned of contaminants such as oil stains by using a degreasing agent; then, sand blasting white corundum to polish the surface of the workpiece to reach the roughness of 75-125 um; then removing oxide skin and iron rust attachments on the surface of the workpiece to achieve surface cleanliness Sa3.0.
9. The surface treatment process of metal parts according to any one of claims 5 to 7, wherein in the step (1), the spraying distance is controlled to be 150-200 mm, the ratio of oxygen to propane is 5:1, and the thickness of the coating is more than 1.5 mm.
10. Use of the metallic part surface repair material according to any one of claims 1 to 4 in the automotive, aerospace field.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113308662A (en) * | 2021-05-26 | 2021-08-27 | 泰尔(安徽)工业科技服务有限公司 | Spraying repair method for short-edge copper plate side surface of continuous casting crystallizer |
| CN113832461A (en) * | 2021-09-23 | 2021-12-24 | 浙江亚通焊材有限公司 | Nickel-based alloy powder for laser cladding, ceramic particle reinforced composite powder and application |
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| CN113832461B (en) * | 2021-09-23 | 2024-03-29 | 浙江亚通新材料股份有限公司 | Nickel-based alloy powder for laser cladding, ceramic particle reinforced composite powder and application |
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